/*
 *  This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Authors: Faker Moatamri <faker.moatamri@sophia.inria.fr>
 *          Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 */

#include "display-functions.h"

#include "raw-text-config.h"

#include "ns3/config.h"
#include "ns3/pointer.h"
#include "ns3/string.h"

namespace ns3
{
/*
 * This function includes the name of the attribute or the editable value
 * in the second column
 */
void
cell_data_function_col_1(GtkTreeViewColumn* col,
                         GtkCellRenderer* renderer,
                         GtkTreeModel* model,
                         GtkTreeIter* iter,
                         gpointer user_data)
{
    ModelNode* node = nullptr;
    gtk_tree_model_get(model, iter, COL_NODE, &node, -1);
    if (!node)
    {
        return;
    }
    if (node->type == ModelNode::NODE_ATTRIBUTE)
    {
        StringValue str;
        node->object->GetAttribute(node->name, str);
        g_object_set(renderer, "text", str.Get().c_str(), nullptr);
        g_object_set(renderer, "editable", TRUE, nullptr);
    }
    else
    {
        g_object_set(renderer, "text", "", nullptr);
        g_object_set(renderer, "editable", FALSE, nullptr);
    }
}

/*
 * This function includes the name of the object, pointer, vector or vector item
 * in the first column
 */
void
cell_data_function_col_0(GtkTreeViewColumn* col,
                         GtkCellRenderer* renderer,
                         GtkTreeModel* model,
                         GtkTreeIter* iter,
                         gpointer user_data)
{
    ModelNode* node = nullptr;
    gtk_tree_model_get(model, iter, COL_NODE, &node, -1);
    g_object_set(renderer, "editable", FALSE, nullptr);
    if (!node)
    {
        return;
    }

    switch (node->type)
    {
    case ModelNode::NODE_OBJECT:
        g_object_set(renderer,
                     "text",
                     node->object->GetInstanceTypeId().GetName().c_str(),
                     nullptr);
        break;
    case ModelNode::NODE_POINTER:
        g_object_set(renderer, "text", node->name.c_str(), nullptr);
        break;
    case ModelNode::NODE_VECTOR:
        g_object_set(renderer, "text", node->name.c_str(), nullptr);
        break;
    case ModelNode::NODE_VECTOR_ITEM: {
        std::stringstream oss;
        oss << node->index;
        g_object_set(renderer, "text", oss.str().c_str(), nullptr);
    }
    break;
    case ModelNode::NODE_ATTRIBUTE:
        g_object_set(renderer, "text", node->name.c_str(), nullptr);
        break;
    }
}

/*
 * This is the callback called when the value of an attribute is changed
 */
void
cell_edited_callback(GtkCellRendererText* cell,
                     gchar* path_string,
                     gchar* new_text,
                     gpointer user_data)
{
    GtkTreeModel* model = GTK_TREE_MODEL(user_data);
    GtkTreeIter iter;
    gtk_tree_model_get_iter_from_string(model, &iter, path_string);
    ModelNode* node = nullptr;
    gtk_tree_model_get(model, &iter, COL_NODE, &node, -1);
    if (!node)
    {
        return;
    }
    NS_ASSERT(node->type == ModelNode::NODE_ATTRIBUTE);
    node->object->SetAttribute(node->name, StringValue(new_text));
}

/*
 * This function gets the column number 0 or 1 from the mouse
 * click
 */
int
get_col_number_from_tree_view_column(GtkTreeViewColumn* col)
{
    GList* cols;
    int num;
    g_return_val_if_fail(col != nullptr, -1);
    g_return_val_if_fail(gtk_tree_view_column_get_tree_view(col) != nullptr, -1);
    cols = gtk_tree_view_get_columns(GTK_TREE_VIEW(gtk_tree_view_column_get_tree_view(col)));
    num = g_list_index(cols, (gpointer)col);
    g_list_free(cols);
    return num;
}

/*
 * This function displays the tooltip for an object, pointer, vector
 * item or an attribute
 */
gboolean
cell_tooltip_callback(GtkWidget* widget,
                      gint x,
                      gint y,
                      gboolean keyboard_tip,
                      GtkTooltip* tooltip,
                      gpointer user_data)
{
    GtkTreeModel* model;
    GtkTreeIter iter;
    GtkTreeViewColumn* column;
    if (!gtk_tree_view_get_tooltip_context(GTK_TREE_VIEW(widget),
                                           &x,
                                           &y,
                                           keyboard_tip,
                                           &model,
                                           nullptr,
                                           &iter))
    {
        return FALSE;
    }
    if (!gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(widget),
                                       x,
                                       y,
                                       nullptr,
                                       &column,
                                       nullptr,
                                       nullptr))
    {
        return FALSE;
    }
    int col = get_col_number_from_tree_view_column(column);

    ModelNode* node = nullptr;
    gtk_tree_model_get(model, &iter, COL_NODE, &node, -1);
    if (!node)
    {
        return FALSE;
    }

    switch (node->type)
    {
    case ModelNode::NODE_OBJECT:
        if (col == 0)
        {
            std::string tip =
                "This object is of type " + node->object->GetInstanceTypeId().GetName();
            gtk_tooltip_set_text(tooltip, tip.c_str());
            return TRUE;
        }
        break;
    case ModelNode::NODE_POINTER:
        if (col == 0)
        {
            PointerValue ptr;
            node->object->GetAttribute(node->name, ptr);
            std::string tip =
                "This object is of type " + ptr.GetObject()->GetInstanceTypeId().GetName();
            gtk_tooltip_set_text(tooltip, tip.c_str());
            return TRUE;
        }
        break;
    case ModelNode::NODE_VECTOR:
        break;
    case ModelNode::NODE_VECTOR_ITEM:
        if (col == 0)
        {
            std::string tip =
                "This object is of type " + node->object->GetInstanceTypeId().GetName();
            gtk_tooltip_set_text(tooltip, tip.c_str());
            return TRUE;
        }
        break;
    case ModelNode::NODE_ATTRIBUTE: {
        uint32_t attrIndex = 0;
        TypeId tid;
        for (tid = node->object->GetInstanceTypeId(); tid.HasParent(); tid = tid.GetParent())
        {
            for (uint32_t i = 0; i < tid.GetAttributeN(); ++i)
            {
                if (tid.GetAttribute(i).name == node->name)
                {
                    attrIndex = i;
                    goto out;
                }
            }
        }
    out:
        if (col == 0)
        {
            std::string tip = tid.GetAttribute(attrIndex).help;
            gtk_tooltip_set_text(tooltip, tip.c_str());
        }
        else
        {
            TypeId::AttributeInformation info = tid.GetAttribute(attrIndex);
            Ptr<const AttributeChecker> checker = info.checker;
            std::string tip;
            tip = "This attribute is of type " + checker->GetValueTypeName();
            if (checker->HasUnderlyingTypeInformation())
            {
                tip += " " + checker->GetUnderlyingTypeInformation();
            }
            gtk_tooltip_set_text(tooltip, tip.c_str());
        }
        return TRUE;
    }
    break;
    }
    return FALSE;
}

/*
 * This is the main view opening the widget, getting tooltips and drawing the
 * tree of attributes...
 */
GtkWidget*
create_view(GtkTreeStore* model)
{
    GtkTreeViewColumn* col;
    GtkCellRenderer* renderer;
    GtkWidget* view;

    view = gtk_tree_view_new();
    g_object_set(view, "has-tooltip", TRUE, nullptr);
    g_signal_connect(view, "query-tooltip", (GCallback)cell_tooltip_callback, 0);

    gtk_tree_view_set_grid_lines(GTK_TREE_VIEW(view), GTK_TREE_VIEW_GRID_LINES_BOTH);
    // gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (view), TRUE);

    col = gtk_tree_view_column_new();
    gtk_tree_view_column_set_title(col, "Object Attributes");
    gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_column_pack_start(col, renderer, TRUE);
    gtk_tree_view_column_set_cell_data_func(col,
                                            renderer,
                                            cell_data_function_col_0,
                                            nullptr,
                                            nullptr);
    g_object_set(renderer, "editable", FALSE, nullptr);

    col = gtk_tree_view_column_new();
    gtk_tree_view_column_set_title(col, "Attribute Value");
    gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
    renderer = gtk_cell_renderer_text_new();
    g_signal_connect(renderer, "edited", (GCallback)cell_edited_callback, model);
    gtk_tree_view_column_pack_start(col, renderer, TRUE);
    gtk_tree_view_column_set_cell_data_func(col,
                                            renderer,
                                            cell_data_function_col_1,
                                            nullptr,
                                            nullptr);

    gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(model));

    g_object_unref(model); /* destroy model automatically with view */

    return view;
}

/*
 * Exit the window when exit button is pressed
 */
void
exit_clicked_callback(GtkButton* button, gpointer user_data)
{
    gtk_main_quit();
    gtk_widget_hide(GTK_WIDGET(user_data));
}

/*
 * Exit the application
 */
gboolean
delete_event_callback(GtkWidget* widget, GdkEvent* event, gpointer user_data)
{
    gtk_main_quit();
    gtk_widget_hide(GTK_WIDGET(user_data));
    return TRUE;
}

/*
 * Delete the tree model contents
 */
gboolean
clean_model_callback(GtkTreeModel* model, GtkTreePath* path, GtkTreeIter* iter, gpointer data)
{
    ModelNode* node = nullptr;
    gtk_tree_model_get(GTK_TREE_MODEL(model), iter, COL_NODE, &node, -1);
    if (node)
    {
        delete node;
    }
    gtk_tree_store_set(GTK_TREE_STORE(model), iter, COL_NODE, nullptr, -1);
    return FALSE;
}

//     display functions used by default configurator
/*
 * This function writes data in the second column, this data is going to be editable
 * if it is a NODE_ATTRIBUTE
 */
void
cell_data_function_col_1_config_default(GtkTreeViewColumn* col,
                                        GtkCellRenderer* renderer,
                                        GtkTreeModel* model,
                                        GtkTreeIter* iter,
                                        gpointer user_data)
{
    ModelTypeid* node = nullptr;
    gtk_tree_model_get(model, iter, COL_TYPEID, &node, -1);
    if (!node)
    {
        return;
    }
    if (node->type == ModelTypeid::NODE_ATTRIBUTE)
    {
        g_object_set(renderer, "text", node->defaultValue.c_str(), nullptr);
        g_object_set(renderer, "editable", TRUE, nullptr);
    }
    else
    {
        g_object_set(renderer, "text", "", nullptr);
        g_object_set(renderer, "editable", FALSE, nullptr);
    }
}

/*
 * This function writes the attribute or typeid name in the column 0
 */
void
cell_data_function_col_0_config_default(GtkTreeViewColumn* col,
                                        GtkCellRenderer* renderer,
                                        GtkTreeModel* model,
                                        GtkTreeIter* iter,
                                        gpointer user_data)
{
    ModelTypeid* node = nullptr;
    gtk_tree_model_get(model, iter, COL_NODE, &node, -1);
    g_object_set(renderer, "editable", FALSE, nullptr);
    if (!node)
    {
        return;
    }

    switch (node->type)
    {
    case ModelTypeid::NODE_TYPEID:
        g_object_set(renderer, "text", node->tid.GetName().c_str(), nullptr);
        break;
    case ModelTypeid::NODE_ATTRIBUTE:
        g_object_set(renderer, "text", node->name.c_str(), nullptr);
        break;
    }
}

/*
 *  This functions is called whenever there is a change in the value of an attribute
 *  If the input value is ok, it will be updated in the default value and in the
 *  gui, otherwise, it won't be updated in both.
 */
void
cell_edited_callback_config_default(GtkCellRendererText* cell,
                                    gchar* path_string,
                                    gchar* new_text,
                                    gpointer user_data)
{
    GtkTreeModel* model = GTK_TREE_MODEL(user_data);
    GtkTreeIter iter;
    gtk_tree_model_get_iter_from_string(model, &iter, path_string);
    ModelTypeid* node = nullptr;
    gtk_tree_model_get(model, &iter, COL_NODE, &node, -1);
    if (!node)
    {
        return;
    }
    NS_ASSERT(node->type == ModelTypeid::NODE_ATTRIBUTE);
    if (Config::SetDefaultFailSafe(node->tid.GetAttributeFullName(node->index),
                                   StringValue(new_text)))
    {
        node->defaultValue = new_text;
    }
}

/*
 * This function is used to display a tooltip whenever the user puts the mouse
 * over a type ID or an attribute. It will give the type and the possible values of
 * an attribute value and the type of the object for an attribute object or a
 * typeID object
 *
 * \param widget is the display object
 * \param x is the x position
 * \param y is the y position
 * \param keyboard_tip
 * \param tooltip is the tooltip information to be displayed
 * \param user_data
 * \return false if the tooltip is not displayed
 */
gboolean
cell_tooltip_callback_config_default(GtkWidget* widget,
                                     gint x,
                                     gint y,
                                     gboolean keyboard_tip,
                                     GtkTooltip* tooltip,
                                     gpointer user_data)
{
    GtkTreeModel* model;
    GtkTreeIter iter;
    GtkTreeViewColumn* column;
    if (!gtk_tree_view_get_tooltip_context(GTK_TREE_VIEW(widget),
                                           &x,
                                           &y,
                                           keyboard_tip,
                                           &model,
                                           nullptr,
                                           &iter))
    {
        return FALSE;
    }
    if (!gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(widget),
                                       x,
                                       y,
                                       nullptr,
                                       &column,
                                       nullptr,
                                       nullptr))
    {
        return FALSE;
    }
    int col = get_col_number_from_tree_view_column(column);

    ModelTypeid* node = nullptr;
    gtk_tree_model_get(model, &iter, COL_NODE, &node, -1);
    if (!node)
    {
        return FALSE;
    }

    switch (node->type)
    {
    case ModelTypeid::NODE_TYPEID:
        if (col == 0)
        {
            std::string tip = "This object is of type " + node->tid.GetName();
            gtk_tooltip_set_text(tooltip, tip.c_str());
            return TRUE;
        }
        break;
    case ModelTypeid::NODE_ATTRIBUTE: {
        uint32_t attrIndex = node->index;
        if (col == 0)
        {
            std::string tip = node->tid.GetAttribute(attrIndex).help;
            gtk_tooltip_set_text(tooltip, tip.c_str());
        }
        else
        {
            Ptr<const AttributeChecker> checker = node->tid.GetAttribute(attrIndex).checker;
            std::string tip;
            tip = "This attribute is of type " + checker->GetValueTypeName();
            if (checker->HasUnderlyingTypeInformation())
            {
                tip += " " + checker->GetUnderlyingTypeInformation();
            }
            gtk_tooltip_set_text(tooltip, tip.c_str());
        }
        return TRUE;
    }
    break;
    }
    return FALSE;
}

/*
 * This is the action done when the user presses on the save button.
 * It will save the config to a file.
 *
 * \param button (unused)
 * \param user_data
 */
void
save_clicked_default(GtkButton* button, gpointer user_data)
{
    GtkWindow* parent_window = GTK_WINDOW(user_data);

    GtkFileChooserNative* native;
    GtkFileChooser* chooser;
    GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_SAVE;
    gint res;

    native = gtk_file_chooser_native_new("Save File", parent_window, action, "_Save", "_Cancel");
    chooser = GTK_FILE_CHOOSER(native);

    gtk_file_chooser_set_do_overwrite_confirmation(chooser, TRUE);

    gtk_file_chooser_set_current_name(chooser, ("config-defaults.txt"));

    res = gtk_native_dialog_run(GTK_NATIVE_DIALOG(native));
    if (res == GTK_RESPONSE_ACCEPT)
    {
        char* filename;

        filename = gtk_file_chooser_get_filename(chooser);
        RawTextConfigSave config;
        config.SetFilename(filename);
        config.Default();
        g_free(filename);
    }

    g_object_unref(native);
}

/*
 * If the user presses the button load, it will load the config file into memory.
 *
 * \param button (unused)
 * \param user_data
 */
void
load_clicked_default(GtkButton* button, gpointer user_data)
{
    GtkWindow* parent_window = GTK_WINDOW(user_data);
    GtkFileChooserNative* native;
    GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;
    gint res;

    native = gtk_file_chooser_native_new("Open File", parent_window, action, "_Open", "_Cancel");

    res = gtk_native_dialog_run(GTK_NATIVE_DIALOG(native));
    if (res == GTK_RESPONSE_ACCEPT)
    {
        char* filename;
        GtkFileChooser* chooser = GTK_FILE_CHOOSER(native);
        filename = gtk_file_chooser_get_filename(chooser);
        RawTextConfigLoad config;
        config.SetFilename(filename);
        config.Default();
        g_free(filename);
    }

    g_object_unref(native);
}

/*
 * This is the action done when the user presses on the save button.
 * It will save the config to a file.
 *
 * \param button (unused)
 * \param user_data
 */
void
save_clicked_attribute(GtkButton* button, gpointer user_data)
{
    GtkWindow* parent_window = GTK_WINDOW(user_data);

    GtkFileChooserNative* native;
    GtkFileChooser* chooser;
    GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_SAVE;
    gint res;

    native = gtk_file_chooser_native_new("Save File", parent_window, action, "_Save", "_Cancel");
    chooser = GTK_FILE_CHOOSER(native);

    gtk_file_chooser_set_do_overwrite_confirmation(chooser, TRUE);

    gtk_file_chooser_set_current_name(chooser, ("config-attributes.txt"));

    res = gtk_native_dialog_run(GTK_NATIVE_DIALOG(native));
    if (res == GTK_RESPONSE_ACCEPT)
    {
        char* filename;

        filename = gtk_file_chooser_get_filename(chooser);
        RawTextConfigSave config;
        config.SetFilename(filename);
        config.Attributes();
        g_free(filename);
    }

    g_object_unref(native);
}

/*
 * If the user presses the button load, it will load the config file into memory.
 *
 * \param button (unused)
 * \param user_data
 */
void
load_clicked_attribute(GtkButton* button, gpointer user_data)
{
    GtkWindow* parent_window = GTK_WINDOW(user_data);
    GtkFileChooserNative* native;
    GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;
    gint res;

    native = gtk_file_chooser_native_new("Open File", parent_window, action, "_Open", "_Cancel");

    res = gtk_native_dialog_run(GTK_NATIVE_DIALOG(native));
    if (res == GTK_RESPONSE_ACCEPT)
    {
        char* filename;
        GtkFileChooser* chooser = GTK_FILE_CHOOSER(native);
        filename = gtk_file_chooser_get_filename(chooser);
        RawTextConfigLoad config;
        config.SetFilename(filename);
        config.Attributes();
        g_free(filename);
    }

    g_object_unref(native);
}

/*
 * This is the main view opening the widget, getting tooltips and drawing the
 * tree of attributes
 */
GtkWidget*
create_view_config_default(GtkTreeStore* model)
{
    GtkTreeViewColumn* col;
    GtkCellRenderer* renderer;
    GtkWidget* view;

    view = gtk_tree_view_new();
    g_object_set(view, "has-tooltip", TRUE, nullptr);
    g_signal_connect(view, "query-tooltip", (GCallback)cell_tooltip_callback_config_default, 0);

    gtk_tree_view_set_grid_lines(GTK_TREE_VIEW(view), GTK_TREE_VIEW_GRID_LINES_BOTH);
    // gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (view), TRUE);

    col = gtk_tree_view_column_new();
    gtk_tree_view_column_set_title(col, "Object Attributes");
    gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_column_pack_start(col, renderer, TRUE);
    gtk_tree_view_column_set_cell_data_func(col,
                                            renderer,
                                            cell_data_function_col_0_config_default,
                                            nullptr,
                                            nullptr);
    g_object_set(renderer, "editable", FALSE, nullptr);

    col = gtk_tree_view_column_new();
    gtk_tree_view_column_set_title(col, "Attribute Value");
    gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
    renderer = gtk_cell_renderer_text_new();
    g_signal_connect(renderer, "edited", (GCallback)cell_edited_callback_config_default, model);
    gtk_tree_view_column_pack_start(col, renderer, TRUE);
    gtk_tree_view_column_set_cell_data_func(col,
                                            renderer,
                                            cell_data_function_col_1_config_default,
                                            nullptr,
                                            nullptr);

    gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(model));

    g_object_unref(model); /* destroy model automatically with view */

    return view;
}

/*
 * Delete the tree model contents
 */
gboolean
clean_model_callback_config_default(GtkTreeModel* model,
                                    GtkTreePath* path,
                                    GtkTreeIter* iter,
                                    gpointer data)
{
    ModelTypeid* node = nullptr;
    gtk_tree_model_get(GTK_TREE_MODEL(model), iter, COL_TYPEID, &node, -1);
    if (node)
    {
        delete node;
    }
    gtk_tree_store_set(GTK_TREE_STORE(model), iter, COL_TYPEID, nullptr, -1);
    return FALSE;
}

} // namespace ns3
